وَإِن فَاتَكُمۡ شَيۡءٞ مِّنۡ أَزۡوَٰجِكُمۡ إِلَى ٱلۡكُفَّارِ فَعَاقَبۡتُمۡ فَـَٔاتُواْ ٱلَّذِينَ ذَهَبَتۡ أَزۡوَٰجُهُم مِّثۡلَ مَآ أَنفَقُواْۚ وَٱتَّقُواْ ٱللَّهَ ٱلَّذِيٓ أَنتُم بِهِۦ مُؤۡمِنُونَ
And if any of your wives have gone from you to the disbelievers, and you have an accession (by the coming over of a woman from the other side), then pay to those whose wives have gone, the equivalent of what they had spent (on their Mahr). And fear Allah in Whom you believe.
يَـٰٓأَيُّهَا ٱلنَّبِيُّ إِذَا جَآءَكَ ٱلۡمُؤۡمِنَٰتُ يُبَايِعۡنَكَ عَلَىٰٓ أَن لَّا يُشۡرِكۡنَ بِٱللَّهِ شَيۡـٔٗا وَلَا يَسۡرِقۡنَ وَلَا يَزۡنِينَ وَلَا يَقۡتُلۡنَ أَوۡلَٰدَهُنَّ وَلَا يَأۡتِينَ بِبُهۡتَٰنٖ يَفۡتَرِينَهُۥ بَيۡنَ أَيۡدِيهِنَّ وَأَرۡجُلِهِنَّ وَلَا يَعۡصِينَكَ فِي مَعۡرُوفٖ فَبَايِعۡهُنَّ وَٱسۡتَغۡفِرۡ لَهُنَّ ٱللَّهَۚ إِنَّ ٱللَّهَ غَفُورٞ رَّحِيمٞ
O Prophet! When believing women come to you to give you the Bai'a (pledge), that they will not associate anything in worship with Allah, that they will not steal, that they will not commit illegal sexual intercourse, that they will not kill their children, that they will not utter slander, intentionally forging falsehood (i.e. by making illegal children belonging to their husbands), and that they will not disobey you in any Ma'ruf (Islamic Monotheism and all that which Islam ordains) then accept their Bai'a (pledge), and ask Allah to forgive them, Verily, Allah is Oft-Forgiving, Most Merciful.